<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
    <head>
        <title>dupe IDs</title>
    </head>
    <body>
        <p id="aaa"></p>
        <p id="aaa"></p>        
    </body>
</html>
